TY  - RPRT
TI  - Geology of the Three Forks quadrangle, Montana, with sections on petrography of igneous rocks
AU  - G. D. Robinson
AU  - Henry Frank Barnett
PY  - 1963
DO  - 10.3133/pp370
UR  - https://pubs.usgs.gov/publication/pp370
ID  - pp370
ER  -